How to index a String in Rust

Question

I am attempting to index a string in Rust, but the compiler throws an error. My code (Project Euler problem 4, playground):

fn is_palindrome(num: u64) ->          


        

Answer 1

You can convert a String or &str to a vec of a chars and then index that vec.

For example:

fn main() {
    let s = "Hello world!";
    let my_vec: Vec = s.chars().collect();
    println!("my_vec[0]: {}", my_vec[0]);
    println!("my_vec[1]: {}", my_vec[1]);
}

Here you have a live example